How can I import multiple files at the same time using UIDocumentPickerViewController?

Use the following code snippet, this will add a Select button next to the header to select multiple files at once and import them.

UIDocumentPickerViewController *dvc = [[UIDocumentPickerViewController alloc]initWithDocumentTypes:arrContents inMode:UIDocumentPickerModeImport];
        dvc.delegate = self;
        [self presentViewController:dvc animated:true completion:^{
            if (@available(iOS 11.0, *)) {
                    dvc.allowsMultipleSelection = true;
            }
        }];

      

        
        
        
      

    

and

- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentsAtURLs:(NSArray <NSURL *>*)urls

to get a list of the selected files.